Louis chaely ltjgmaye



( No Model.)

L. G. LUGMAYR.

VALVE GEAR FOR. ENGINES.

No. 307,128. Patented Oct. 2 1884.

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I UNITED STATES PATENT Orrics.

LOUIS CHAR-LY LUGMAYR, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE-HALFTO JOHN GBIME, OF SAME PLACE.

VALVE-GEAR FOR ENGINES.

SPECIFICATION forming part of LettersPatent No. 307,128, dated October28, 1884.

Application filed May 26, 1884. (No model.)

I (0% whom it may concern:

Be it known that I, Louis 0. LUGMAYR, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inValve-Gear for Engines, of which the following is aspecifieation.

My invention relates to that class of steamengines in which the valvesare operated with one eccentric; and the objects of my invention are towork the valves for cutting off grams of the mechanism and operation.

bymeans of one eccentric, and to enable the engine to be reversed withthe same mechanism.

The invention consists in the slide-block connected with the eccentricand valve-rod,

and carried by a guide or slide suitably pivoted to swing for shiftingthe valve, and in the adjustment of other parts of the engine tosuitsuch mechanism.

In the drawings, Figure 1 is a side view ofa vertical engine containingthe improvements. Figs. 2, 3, and at are illustrative dia- Figs. 5 to 8are details of the guide and block.

B is the crankshaft ol' the engine, provided with the cranlearm b, fromwhich the rod 7; passes to the cross-head or pistoirslidef,

A is an eccentric on the shaft B, provided with a strap, a, from whichthe arm a extends in a plane parallel with the plane of the crank-armI).

G is a rod from the eccentric-arm a to the valve-stem v. The end of therod 0 is pivoted to'the arm a, within the slot a", by means of athumb-screw or other suitable means, whereby it may be adjusted toregulate the valve movement.

D is a rock-shaft fitted in suitable hearings on the bed-plate, andprovided with a handlever, 71 by means of which the rock'shaft can begiven the desired partial revolution. This hand-lever moves at the sideof a segment-plate suitably notched for engaging a spring-catch, h, onthe lever, and the lever is thereby held in the position to which it ismoved.

On the end of the rock-shaft D is the guide 6, carrying the slide-blockc, at the center of which is connected the eccentric-arm a by a pivot,r. The guideeis a solid piece of metal,

preferably made somewhat wide and flat, and has its edges beveled on theside next to the rock-shaft, and fits into a corresponding groove in theblock 0. the guide 6 and block 0 may be somewhat varied from the formsshown and described to serve the same purpose. The lever h enables therock-shaft to be turned, so as to bring either end of the guide 6 aboveor below the axis of the rock-shaft, as desired. The two extremepositions to which the guide may be turned are shown by the lines a: mand y y in Figs. 2, 3, and 4., in both of which positions the cutoff ismade at full-stroke. By adjusting the guide to intermediatepoints, bymeans of the lever 71., the cut-off may be regulated as desired. In anyposition of the guide the revolution of the shaft B moves theeccentricarm a, in and out and carries the slide-block c forth and backon its guide, and the rod and when the guide is turned to its extremelim its, as illustrated in the diagrams Figs. 2, 8, and 4. The valvemovementcan also be somewhat controlled by adjustment of the valverod Gin the slot a in the eccentric-arm, an adjustment toward the outer endof the arm tending to shorten the throw of the rod and toward theeccentric tending to lengthen the rod-throw.

In building the engine the parts should be so constructed that,insetting up,the geometric center of the eccentric will beiuline with theaxes of the crank-pin Z and shaft B, and the axes of the shafts B and Dshould be in the same horizontal plane in a vertical engine and in thesame vertical plane in a horizontal engine.

I am aware that in Letters Patent No. 252,683, granted to myself January24, 1882, is shown a means for operating engine-valves with oneeccentric and for reversal of the engine with the same mechanism, and Ithere= fore do not claim, broadly, such construction and combination;but

Vhat I do claim, and desire to secure by Letters Patent, is

The shape and size of LOO The combination, with the shaft 13, having Iblock being connected to the eccentric-arm a the cranlparrn I),connected by it rod to the by t pivot, a, all constructed and arrangedI0 cross-head, and the eccentric A, having the substantially as and forthe purpose set forth. strap a and arm (1 provided with the slot a T t tr T ,p

5 within which the i'od 0, connecting with the Is CHARLY LUGMAXR'valve-stem o, is pivoted, oi the lever 71, at- Vitnesses:

tachcd to the rock-shaft D, on which shaft is J. F. GoLLoM, carried theguide a and siideblock c, said siide- MILTON H. BIOKEL.

